Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 153.5gr | Berger Long Range Hybrid Target bullet and 55 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and Winchester StaBALL HD.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 45,745 psi | 89% | 2457 fps | 99.1% |
| Accurate 4350 | <<locked>> | 86% | 44,454 psi | 86% | 2448 fps | 99.8% |
| Accurate High Country | <<locked>> | 94% | 46,253 psi | 90% | 2572 fps | 96.3% |
| ADI AR 2209 | <<locked>> | 92% | 45,716 psi | 89% | 2484 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 45,832 psi | 89% | 2503 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 46,108 psi | 90% | 2523 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 45,426 psi | 88% | 2480 fps | 97% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,368 psi | 88% | 2526 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 45,934 psi | 89% | 2523 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,685 psi | 83% | 2507 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 94% | 44,889 psi | 87% | 2582 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 44,701 psi | 87% | 2513 fps | 96.8% |
| Bofors RP5 | <<locked>> | 96% | 45,368 psi | 88% | 2526 fps | 97.2% |
| Bofors RP7 | <<locked>> | 84% | 45,847 psi | 89% | 2405 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 84% | 43,671 psi | 85% | 2441 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 82% | 43,961 psi | 85% | 2408 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 45,818 psi | 89% | 2441 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 41,814 psi | 81% | 2530 fps | 96.7% |
| Hodgdon Superformance | <<locked>> | 86% | 46,122 psi | 90% | 2520 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,347 psi | 71% | 1555 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 46,528 psi | 90% | 2438 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 44,686 psi | 87% | 2385 fps | 98.1% |
| IMR 4831 | <<locked>> | 88% | 45,484 psi | 88% | 2451 fps | 99.9% |
| Lovex S065 | <<locked>> | 84% | 44,672 psi | 87% | 2388 fps | 99.1% |
| Lovex S070 | <<locked>> | 86% | 45,455 psi | 88% | 2421 fps | 98.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,395 psi | 84% | 2421 fps | 98.8% |
| Norma 204 | <<locked>> | 88% | 46,369 psi | 90% | 2474 fps | 96.9% |
| Norma MRP | <<locked>> | 94% | 44,759 psi | 87% | 2546 fps | 98.3% |
| Norma URP | <<locked>> | 86% | 44,019 psi | 85% | 2441 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 88% | 45,571 psi | 89% | 2484 fps | 99% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,237 psi | 88% | 2510 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,043 psi | 72% | 1594 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 45,905 psi | 89% | 2516 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 44,324 psi | 86% | 2470 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 45,963 psi | 89% | 2536 fps | 99.7% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,510 psi | 81% | 2523 fps | 97.7% |
| Rottweil R 903 | <<locked>> | 82% | 46,108 psi | 90% | 2421 fps | 100% |
| Rottweil R 905 | <<locked>> | 92% | 44,237 psi | 86% | 2461 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 84% | 45,847 psi | 89% | 2405 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 44,672 psi | 87% | 2388 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 86% | 45,455 psi | 88% | 2421 fps | 98.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 43,888 psi | 85% | 2339 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,830 psi | 85% | 2457 fps | 96.8% |
| Somchem S355 | <<locked>> | 82% | 46,427 psi | 90% | 2418 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 45,788 psi | 89% | 2493 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 45,034 psi | 87% | 2448 fps | 97.8% |
| Vihtavuori N150 | <<locked>> | 82% | 44,338 psi | 86% | 2356 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 45,687 psi | 89% | 2434 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 96% | 44,324 psi | 86% | 2425 fps | 97.2% |
| Vihtavuori N550 | <<locked>> | 86% | 45,121 psi | 88% | 2444 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 94% | 45,165 psi | 88% | 2497 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 44,962 psi | 87% | 2411 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 43,990 psi | 85% | 2448 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,005 psi | 85% | 2621 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,425 psi | 86% | 2434 fps | 96.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 86% | 32,503 psi | 63% | 2208 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 36,274 psi | 70% | 2297 fps | 98.6% |
| Accurate High Country | <<locked>> | 92% | 43,308 psi | 84% | 2520 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 88% | 40,219 psi | 78% | 2379 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,665 psi | 69% | 2310 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,161 psi | 78% | 2418 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 39,784 psi | 77% | 2375 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 92% | 39,914 psi | 78% | 2421 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,179 psi | 51% | 2096 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 90% | 31,256 psi | 61% | 2247 fps | 95.7% |
| Alliant Reloder-26 | 39.8 gr | 82% | 29,530 psi | 57% | 2244 fps | 95.9% |
| Bofors RP15 | <<locked>> | 94% | 39,378 psi | 76% | 2411 fps | 95.2% |
| Bofors RP5 | <<locked>> | 92% | 39,914 psi | 78% | 2421 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 40,698 psi | 79% | 2313 fps | 96.7% |
| Hodgdon H414 | <<locked>> | 80% | 38,406 psi | 75% | 2343 fps | 96.8% |
| Hodgdon H4350 | <<locked>> | 80% | 41,263 psi | 80% | 2356 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,257 psi | 65% | 2215 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 98% | 39,276 psi | 76% | 2474 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 37,304 psi | 72% | 2349 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,282 psi | 53% | 1391 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 36,201 psi | 70% | 2244 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,003 psi | 82% | 2339 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 35,056 psi | 68% | 2257 fps | 98.4% |
| Lovex S065 | <<locked>> | 80% | 39,682 psi | 77% | 2297 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 37,666 psi | 73% | 2277 fps | 96.7% |
| Lovex S071 | <<locked>> | 90% | 31,531 psi | 61% | 2188 fps | 95.4% |
| Norma 204 | <<locked>> | 84% | 40,741 psi | 79% | 2375 fps | 95.4% |
| Norma MRP | 40.5 gr | 86% | 34,142 psi | 66% | 2323 fps | 95% |
| Norma URP | <<locked>> | 80% | 36,172 psi | 70% | 2293 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 80% | 35,070 psi | 68% | 2283 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 96% | 39,247 psi | 76% | 2398 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,688 psi | 54% | 1421 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,670 psi | 83% | 2464 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,129 psi | 70% | 2316 fps | 98.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,172 psi | 68% | 2323 fps | 97.7% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 36,289 psi | 70% | 2405 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 43,192 psi | 84% | 2372 fps | 100% |
| Rottweil R 905 | <<locked>> | 88% | 38,783 psi | 75% | 2359 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 40,698 psi | 79% | 2313 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,682 psi | 77% | 2297 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 80% | 37,666 psi | 73% | 2277 fps | 96.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,638 psi | 75% | 2244 fps | 96.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 38,421 psi | 75% | 2356 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 43,874 psi | 85% | 2379 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 32,648 psi | 63% | 2257 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 37,173 psi | 72% | 2300 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 41,553 psi | 81% | 2310 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,565 psi | 73% | 2290 fps | 98.7% |
| Vihtavuori N165 | <<locked>> | 92% | 38,943 psi | 76% | 2329 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 37,043 psi | 72% | 2293 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 28,514 psi | 55% | 2159 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,796 psi | 71% | 2267 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 38,406 psi | 75% | 2343 fps | 96.8% |
| Winchester StaBALL HD | 37.3 gr | 80% | 22,974 psi | 45% | 2064 fps | 95% |
| Winchester Supreme 780 | <<locked>> | 90% | 38,943 psi | 76% | 2333 fps | 95% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 55 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 153.5gr | Berger Long Range Hybrid Target. Winchester StaBALL HD delivers the highest muzzle velocity at 2,621 fps; across all powders the maximum-charge window runs from 1,555 fps to 2,621 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 55 of the 55 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (355 MPa), the top charges use 71–90 %, leaving at least 10 % headroom. The 153.5 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Hodgdon Retumbo, Hodgdon TrailBoss reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Norma MRP, Alliant Reloder-26, Winchester StaBALL HD rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 153.5gr | Berger Long Range Hybrid Target they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.